The term 'Magazine Boss' can be broken down into two words: EDITOR (6 letters). An EDITOR is a person who is responsible for the content of a magazine. They are in charge of selecting, editing, and publishing articles, stories, and other materials that appear in the magazine. They also oversee the layout and design of the magazine, as well as the marketing and advertising campaigns. Editors are also responsible for ensuring that the magazine meets all legal and ethical standards.